Year	Percent of total labor force
1991	0.1
1992	0.5
1993	1.4
1994	2.1
1995	2.896
1996	4.022
1997	2.787
1998	2.339
1999	2.1
2000	2.115
2001	2.257
2002	2.652
2003	3.135
2004	2.522
2005	1.704
2006	1.416
2007	1.063
2008	0.94
2009	0.901
2010	0.827
2011	0.668
2012	0.614
2013	0.508
2014	0.488
2015	0.912
2016	1.017
2017	0.768
2018	0.768
2019	0.768
2020	0.768
2021	0.768
2022	0.768
2023	0.768
2024	0.768